3 Port Valves and Y Plan Heating Systems – Plumbing Tips

3 Port Valves and Y Plan Heating Systems – Plumbing Tips


– [Announcer] Plumber Parts dot CO dot UK. Honest reviews and advice, sponsored by Heat and Plumb dot com. – Hello and welcome to
this Plumber Parts video. Today, I’m going to tell you about three-port valves that
position the heating system and how to instal their control heads. Basically, giving you a brief explanation. If you want anymore detailed information you’ll have to contact
us and go to our website at Plumber Parts dot CO dot UK. Let’s first have a look at
the position of the 3-port valve in the heating system. This pipe here is the flow
from our boiler, okay? It comes up here through the pump, is pumped up through this pipe here to our 3-port valve here, Okay? Now what the 3-port valve then does is divert hot water, either through here into the
coil of the hot water tank and back out to the boiler, or, through here, which is off
down to the heating system, okay, to the radiators. Now it does that according to
whether it is being controlled by either the thermostat
on the side of the tank, this side, or your
thermostat in your room. Now, we should send it off down this side. Now that might sound simple enough but the complication comes in
when you try to wire them in. For most heating engineers like me, or other people who are
experienced in this, it’s an easy thing to do. But if you don’t know what you are doing, you can easily get in an electric shock, or the system just won’t
work properly at all. Now only do this if you
know what you’re doing and you’re competent with electric, okay, and you have a tester. For God’s sake don’t
touch anything that you haven’t tested first, okay? So here’s the control box. I’m just going to remove this cover. Right. So that is why
you take the cover off and you look at that
and you say, oh, my God, what is going on here? Once you isolate each wire,
find out what it does, then you’re in a much
better position, okay, and you’ll be able to
figure it out a bit easier, with any luck. Now we can have a look at this. This is our replacement head, okay. But, I’ll tell you what these wires do and basically how this works, okay, becomes sometimes there can be confusing the three-port valve type because when it’s only on heating, it has to have a separate
live that keeps the boiler and pump on, okay? Now, so what we have
here is pretty simple. We have our standard wire here, this is our earth wire. That goes into the earth. This is our neutral, okay? Now these two here are
our signal wires, okay. Now, on a two-port valve
you have a live earth and a neutral, okay, and then a switch live and
then a switched out, okay? So when, what happens is,
is your two-port valve is livened up the motor moves round, clicks a switch, and then it turns that switch live on back to the boiler and the pump. Now, with a 3-port valve, it’s a bit different. You’ve got your live, uh, your neutral and your earth, okay? Right, and then you have a live on, you have two lives here, okay. Now these get livened up according to what services you’re looking for, okay? And they also move the
motor around, right. So, say your white is your hot water, and your heating is your grey, okay, say the white moves around, the motor moves around, and then what it does, it switches the live that
goes through the white, through the motor and then
back out on this orange off to the boiler and the pump, right? Similarly, it works in
exactly the same way for the heating system. Say it comes down, the
heating system comes on, it gets signalled by the programmer, it goes through the
thermostat in the room, comes back, switches down here, opens the valve, the valve makes, and then it livens up back down here, off to your boiler and your pump, to tell them to come on. The idea of having a switch
in one of these motors to tell the boiler or the pump to come on, is so the boiler and the pump doesn’t run when there’s no flow to go to, okay. Which could result in
the boiler overheating, sections cracking, heating systems over-pressurizing, and loads of problems like that, Okay? I hope you found this
video somewhat informative and opens your eyes a little bit more to how 3-port valves work, where they’re on the system, and why they’re so
important for diverting heat to the certain areas
according to the thermostats that are calling for
those areas to have heat. If you want anymore advice
or anymore information, go to our website at
Plumber Parts dot CO dot UK, messages on YouTube, or get ahold of us through that website. I hope to see you again, and keep up to date with us, and see you soon. Thanks very much. Bye-bye. – [Announcer] Plumber Parts dot CO dot UK. Honest reviews and advice. Sponsored by Heat and Plumb dot com.